Disposable ampoule syringe



Dec. 6, 1949 A, E, SMITH 2,490,551

DISPOSABLE AMPOULE SYRINGE Filed Sept. 20, 1947 Patented Dec. 6, 1949 UNITED STATES PATENT OFFICE DISPOSABLE AMPOULE SYRINGE Arthur E. Smith, Los Angeles, Calif.

Application September 20, 1947, Serial No. 775,192

(Cl. 12S-218) 3 Claims.

This invention relates to a disposable ampule syringe.

The general object of the invention is to provide a single-use hypodermic syringe whereby medicinal compounds, such as penicillin-oil-waX, may be efficiently administered.

A more specific object of the invention is to provide a hypodermic syringe of the disposable type wherein a novel combined ampule iront member and needle support is provided.

Another object of the invention is to provide a disposable syringe including novel means for shiftably mounting a hypodermic needle there- Another object of the invention is to provide a syringe which includes a needle shiftable to place the device in operative condition and wherein novel means is provided for preventing accidental longitudinal and/or lateral shifting of the needle during shipping and handling.

Other objects and advantages of my invention will be apparent from the following description taken in connection with the accompanying drawings, wherein:

Fig. 1 is a central sectional view, showing a syringe embodying the features of my invention;

Fig. 2 is a View similar to Fig. 1, showing the syringe in operative condition, and

Fig. 3 is a similar view, showing the syringe after the contents have been expelled.

Referring to the drawing by reference characters, I have shown my invention as embodied in a disposable hypodermic syringe which is indicated generally at I0. As shown, the syringe includes a medicinal holding ampule I I in which a plunger I2 slides. The plunger includes a piston I3, movement of which serves to expel the contents of the ampule.

Mounted on the ampule I arrange a front member I4 which has a finger engaging shoulder l5 thereon. The front member includes a forwardly projecting tip I6 which is disposed adjacent to a shoulder I7. Both the tip I6 and shoulder I'I are preferably cylindrical and the front member includes an axial bore IS which extends inwardly to a diaphragm I9. A hole 2D, coaxial with the bore I 8, is arranged on the inner face of the front member.

Mounted upon the front member tip I6, is a cap 2 I, which has a skirt 22 thereon. The skirt 22 engages and is slidable along the tip I6. The cap is provided with a bore 23, through which a needle 24 extends. The needle 24 includes a protuberance 25, arranged in the body of the cap to prevent movement of the needle relative to the cap. The needle preferably includes an inwardly directed, sharpened end 26 and an outwardly directed, sharpened end 27.

For shipment and handling, the cap is arranged in the position shown in Fig. 1, with the inner end of the needle slightly entering the diaphragm I9 but not piercing this diaphragm.

Mounted upon the shoulder I'I I provide a closure, indicated generally at 28, which includes a body 29, having a skirt 30 which grips the shoulder Il to hold the closure member in place.

The closure member includes a hole 3| in which the end 27 of the needle is arranged.

With the parts shown in the position in Fig. 1, to place the syringe in operative condition, the closure member 28 is removed and the cap 2| is moved towards the ampule, causing the inner end 26 of the needle to fully pierce the diaphragm I9 so that the parts assume the position shown in Fig. 2.

In using many drugs it is essential that injection be not made in a vein or artery and to determine whether the needle has been inserted in a vein or artery, after the insertion is made, the plunger is pushed slightly inwardly and then withdrawn and if the point of the needle has punctured a blood vessel it will cause blood to be aspirated into the ampule. Thus a check is provided against improper injection.

The piston and front member may preferably be made of rubber. The other parts of the syringe may be made of plastic material.

The present application discloses a similar construction to the construction in applicants copending applications, Serial Nos. 775,193 and 775,194, both applications led September 20, 1947. In the present application, however, the claims are directed to the front closure member and cap thereon which carries a diaphragm piercing needle, while in applications Serial Nos. 775,193 and 775,194 the claims are directed to the construction which causes fluid to flow from behind the piston plunger to a position in front of the piston plunger.

From the foregoing description it will be apparent that I have invented a novel syringe which can lbe economically manufactured and prepared for use, and which is highly efficient for its intended purpose.

Having thus described my invention, I claim:

1. A disposable syringe including an ampule having a plunger slidable therein, a front inemu ber on said ampule, said front member having a forwardly projecting tip thereon, said front member having a shoulder adjacent to said tip, said front member including a diaphragm, a

2. A disposable syringe including an ampuleV having a plunger slidable therein, said plunger comprising an elongated body having a pistonv thereon, a front member on said ampule," said front member having a forwardlyprojecting tip thereon, said front member having a shoulder adjacent to said tip, said front member having an axial bore, a diaphragm closing the inner end bfsaidbore, a cap remotefrom the ampule and including a body having a projecting skirt slidabile on'fs'aid tip, a double pointed needle embeddedinand extending through said cap, the

inner endv of said needle being disposed in said if,

bore, the inner end of the needle being of a length to pierce the diaphragm when the cap isY moved: into engagement with said shoulder, and a closure having a body including a skirt,

saidv closure skirt engaging said shoulder,y said 511i closure skirt being spacedfrom said cap, a portion: of said f closureV engaging, said needle.

3'.- A disposable syringe including an ampule having, a plunger slidable therein, said plunger colnprisingan elongated body having a piston 1"" thereon, a lfront member on said, ampule, said front-member having a nger engagingA shoulder thereon, said front member having a forwardly projecting tip thereon and` having a bore 'extending inwardly from the outer end of the tip, said front member having a shoulder adjacent to said tip, a diaphragm closing the inner end of said bore, a cap remote from the ampule and including a body having a projecting skirt, said skirt being slidable on said tip, said cap having a bore therethrough, a double pointed needle extending through said cap bore, said needle having. a` protuberance thereon, said, protuberance beim;t embeddedin said,capthe inner end of said needle being disposed in said front member bore, the inner end of the needle being sharpened and being of a length to pierce the diaphragm when the cap is moved into engagement with said shoulder, and a closure including a body with a skirt thereon, said closure skirt engaging said shoulder, said closure skirt being spaced from saidcap, the body of said closure having a bore receiving the outer endfof said needle.

ARTHURVE. SMITH.

REFERENCES CITED The following references. are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 1,144,343 Benmosche June 29, 1915 1,715,771 MacGregor. June 4,1929 1,737,844; Heineman etal, Dec; 3, 1929 1,867,355, Fletcher July,12, 1932 2,233,554 Fletcher Mar. 4, 1941 2,345,301 Smith Mar. 28, 1944 2,388,323 Henderson Nov. 6, 1945 FOREIGN PATENTS Number Country. Date 182,531 Switzerland May 1, 1936 

